Radio Shack 120-2157 User Manual Download Page 6

           connections in the order shown, damage to the stereo is 
           possible if any wire connections are made incorrectly. 
 
           You must connect a separate wire to each speaker terminal as 
           described in the following procedure.  Do not use a common wire 
           or chassis ground for any speaker connection. 
 
Using an Adapter Harness 
 
If you are replacing an existing stereo, or if your vehicle has been  
factory-wired for auto sound components, you might be able to use an  
adapter harness to connect the power and speakers.  RadioShack stores sell  
adapter harnesses for most vehicles. 
 
Follow the directions that come with the adapter harness to temporarily  
connect the ground, power, optional components, and speakers.  Then go to  
"Connecting the Antenna" below. 
 
Connecting Ground, Power, and Optional Components 
 
Follow these steps to connect the harness with the 14-pin connector to  
ground, primary and memory backup power, and optional components. 
 
1.  Disconnect the cable from your vehicle's negative (-) battery 
    terminal. 
 
2.  Connect the black GROUND (-) wire to a chassis ground, such as a metal 
    screw attached to a metal part of the vehicle's frame.  Be sure that 
    the screw is not insulated from the chassis by a plastic part. 
 
3.  Connect the red +12V TO IGNITION power wire (with in-line fuse holder) 
    to a point in your vehicle's fuse block that has power only when you 
    turn the vehicle's key to either the accessory (ACC) or START position 
    This connection turns on the stereo when you turn on the ignition or 
    turn the key to ACC, and turns off the stereo when you turn off the 
    ignition.  This prevents your vehicle's battery from being drained if 
    you leave the stereo on when you turn off the ignition. 
 
4.  Connect the 12V TO BATTERY wire (with in-line fuse holder) to 
    your vehicle battery's positive (+) terminal or to a point in your 
    vehicle's fuse block that provides a continuous source of 12 volts. 
    This connection provides power for the stereo's components (such as 
    the stereo), and continuous power for the stereo's memory when the 
    ignition is turned off. 
 
5.  Connect the blue/white AMP REMOTE TURN ON 500 mA MAX wire to any 

Summary of Contents for 120-2157

Page 1: ...10 Track Programmable lets you program up to 10 tracks from the Memory loaded disc into memory for playback Audible Search lets you rapidly play a CD in either direction to locate a desired section o...

Page 2: ...n is detected Preset Memory Scan scans all stations stored in memory playing each for 5 seconds Advanced FM Optimizer automatically adjusts the tuner s stereo Circuitry separation and high frequency r...

Page 3: ...um with increased dynamic performance This stereo is made and tested to meet exacting safety standards It meets FCC requirements and complies with safety performance standards of the U S Department of...

Page 4: ...it to ground and power optional components and your speakers Then test the connections disconnect the stereo mount it in your vehicle and reconnect it The instructions in this manual are arranged in t...

Page 5: ...power some optional components and speakers IMPORTANT Do not cut these wires If you cut any wire you cannot obtain a refund or exchange on this product However your local Radio Shack store will provi...

Page 6: ...your vehicle s negative battery terminal 2 Connect the black GROUND wire to a chassis ground such as a metal screw attached to a metal part of the vehicle s frame Be sure that the screw is not insula...

Page 7: ...ual for directions Connecting Speakers If you are using both front and rear speakers follow these steps to connect the harness with the 14 pin connector to the speakers If you are using only one pair...

Page 8: ...u verify that the buttons display light follow the instructions in Mounting the Stereo below CAUTION If you played a CD while testing the connections be sure to remove the CD from the stereo before co...

Page 9: ...e short end of the supplied mounting bolt to the back of the stereo 6 Reconnect the wire harness and the antenna 7 Slide the stereo into the sleeve until it locks into place 8 If you are securing the...

Page 10: ...bolt from the mounting hole Or remove the bolt holding the metal strap attached to the back of the stereo 3 Press REL to remove the stereo s control panel 4 Insert the supplied keys into the slots at...

Page 11: ...hange the clock display to a 24 hour format 24 HR lights 4 Repeat Steps 2 3 to return to the 12 hour format 12 HR lights Setting the Time 1 Turn the stereo off and leave the vehicle s ignition on 2 Pr...

Page 12: ...number 0 40 appear WARNING To protect your hearing do not listen at high volume levels Slowly increase the volume to a comfortable listening level Audio Control Repeatedly press SEL LD until BAS Bass...

Page 13: ...ng the Sound above for information about changing the stereo s other settings The Auto Loc mode in Seek tuning first tries to tune a relatively strong or local station If it searches a band completely...

Page 14: ...S AS for at least 2 seconds The tuner searches the band storing the first 6 strongest stations in ascending order then resumes normal radio reception of the last stored station CAUTION Stations you st...

Page 15: ...This is not a malfunction Playing a CD 1 Insert a CD label side up in the slot The player gently grabs the disc and automatically loads it CAUTION Do not use force If you encounter resistance to load...

Page 16: ...then reinsert Note If you eject a CD while it is playing but do not remove it from the CD player the CD player automatically draws the CD back in after about 15 seconds Shuffle Play You can set the CD...

Page 17: ...e During programmed play P and the program number memory appear Press DISP to see the elapsed time and track number Within 4 seconds press DISP again to see the current time for about 4 seconds 4 To c...

Page 18: ...auxiliary signal source Repeatedly press MODE The stereo switches from the CD player to the AUX input to the radio back to the CD player...

Page 19: ...s for a Class B digital device pursuant to Part 15 or the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment...

Page 20: ...ven though a compact disc is durable treat the CD surface with care Do not write on either side of the CD particularly the non label side signals are read from the non label side Do not store CDs in h...

Page 21: ...is blown replace it Use only standard 1 1 4 inch fuses with the proper rating The red 12V TO IGNITION wire s fuse must be 0 5 amps The yellow 12V TO BATTERY wire s fuse must be 12 amps CAUTION The su...

Page 22: ...B Image Rejection 60 dB 65 dB 20 dB Selectivity 70 dB 40 dB 55 dB Signal to Noise S N 65 dB 50 dB 45 dB Stereo Separation 33 dB Usable Sensitivity 3 uV 16 uV 1 uV CD Player Frequency Response 20 Hz 20...

Page 23: ...und Speaker Output Impedance 4 Ohms Power Output RMS 22 Watts x 4 CH Chassis Size HWD 1 15 16 x 6 11 16 x 5 7 8 Inches 50 x 178 x 150 mm Weight 4 lbs 1 8 kg Specifications are typical individual units...

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